DimXpert is part of the SWIFT (SOLIDWORKS Intelligent Feature Technology) functionality found in SOLIDWORKS. More than just dimensioning, DimXpert provides an environment to add dimensions, both manually and automatically, to your designs complete with tolerancing.

DimXpert follows ASME Y14.41-2003 and ISO 16792:2006. Even if you do not typically apply GD&T you can still use the Plus / Minus Tolerancing, represented in many standard (common) formats.